<template>
  <div id="reports" class="app-container">

    <!-- 2.为ECharts准备一个具备大小（宽高）的Dom -->
    <div id="main" style="width: 100%; height: 700px" />
  </div>
</template>

<script>
// 1. 导入 echarts
const echarts = require('echarts')
import _ from 'lodash'

import { reportsChart } from '@/api/reports'

export default {
  data() {
    return {
      // 指定图标的配置项和数据
      options: {
        title: {
          text: '用户来源'
        },
        tooltip: {
          trigger: 'axis',
          axisPointer: {
            type: 'cross',
            label: {
              backgroundColor: '#E9EEF3'
            }
          }
        },
        grid: {
          left: '3%',
          right: '4%',
          bottom: '3%',
          containLabel: true
        },
        xAxis: [
          {
            boundaryGap: false
          }
        ],
        yAxis: [
          {
            type: 'value'
          }
        ]
      }
    }
  },
  created() { },
  // 此时，页面上的元素，已经被渲染完毕！
  mounted() {
    // 3. 基于准备好的dom，初始化echarts实例
    var myChart = echarts.init(document.getElementById('main'))
    reportsChart().then((response) => {
      if (response.data.meta.status !== 200) {
        return this.$message.error('获取折线图数据失败！')
      }
      // 4. 准备数据和配置项
      const result = _.merge(response.data.data, this.options)

      // 5. 展示数据
      myChart.setOption(result)
    })
  },
  methods: {}
}
</script>

<style scoped>
</style>
